So I was clearing out a ship wreck and decided take a nap in a nearby sleeping roll to feel well-rested, when suddenly I woke up working on some temple at the Beast Stone with bunch of cultists.
The Temple of Miraak is close nearby featuring a Tree Stone. Interacting with the stones just makes me their tool again to work at the temple. I tried talking to the cultists but they all spout out mystical one liners.
Is there a quest involved with those cultists, and if so how do I trigger it? Or was this just a random encounter?